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分析了山东省1980～1988年9年中熟组玉米杂交种区域试验和生产示范试验共54个杂交种的产量与穗部性状的关系,结果表明:当亩产量在450kg以下时,起主要作用的是穗粒数、千粒重和穗长,其次是穗行数和双穗;当亩产量在450kg以上时,起主要作用的是穗行数,其次是穗粒数、千粒重和双穗。由此认为,在选育中熟高产(亩产450kg以上)玉米杂交种时.需协调好穗行数、穗粒数与千粒重的关系,使千粒重保持在300g的前提下,应着重对穗行数和穗粒数的选择。
The relationship between the yield and panicle traits of 54 hybrids in regional experiment and production demonstration experiment of maize hybrids of Zhongshu Group in Shandong Province from 1980 to 1988 was analyzed. The results showed that when the yield per mu was below 450kg, Is the number of grains per spike, grain weight per panicle and spike length, followed by the number of ears and double spikes. When the yield per mu is more than 450kg, the number of ear rows, followed by the number of grains per spike, the weight of 1000 grains and the number of double spikes. Therefore, it is necessary to coordinate the relationship between the number of ears per panicle, the number of grains per ear and the weight of 1000-grain when selecting high-yielding and middle-yielding maize hybrids with a yield of more than 450kg per mu. Keep the 1000-grain weight at 300g. Number and the choice of grain number.